diff --git a/lang/cem/libcc/mon/_dup.e b/lang/cem/libcc/mon/_dup.e
index b34d2703..9d117000 100644
--- a/lang/cem/libcc/mon/_dup.e
+++ b/lang/cem/libcc/mon/_dup.e
@@ -3,7 +3,7 @@
  exp $_dup
  pro $_dup,0
  lol 0
- _dup EM_WSIZE
+ dup EM_WSIZE
  loc 41
  mon
  zeq *1